Yazar "Cevik, M. Ugur" seçeneğine göre listele

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    Evaluation of serum oxidant/antioxidant balance in multiple sclerosis
    (Springer Heidelberg, 2012) Acar, Abdullah; Cevik, M. Ugur; Evliyaoglu, Osman; Uzar, Ertugrul; Tamam, Yusuf; Arikanoglu, Adalet; Yucel, Yavuz
    The total oxidative status (TOS)/total anti-oxidative status (TAS) ratio can provide information on an individual's absolute oxidative stress index (OSI). We investigated the alterations in the oxidant-antioxidant balance by measuring the oxidant parameters OSI, TOS, and malondialdehyde (MDA) together with the antioxidant parameters such as TAS, and superoxide dismutase (SOD) in patients with relapsing remitting multiple sclerosis (MS). To our knowledge, this is the first study to evaluate OSI in patients with relapsing remitting MS. 35 ambulatory patients with relapsing-remitting MS (35.8 +/- A 8.7 years) and 32 age- and activity-matched healthy control subjects (35.1 +/- A 3.7 years) that participated in the study. Serum TAS and TOS levels were determined using new automated methods. MS patients had higher concentrations of MDA (151.5 +/- A 51.1 vs. 111.3 +/- A 27.4 nmol/g protein, respectively; p < 0.001), TOS (148.1 +/- A 162.5 vs. 48.3 +/- A 46.4 mmol H2O2 Equiv./g protein, respectively; p = 0.002), OSI (21124 +/- A 32543 vs. 5294 +/- A 5562, respectively; p = 0.008), and SOD (4.5 +/- A 0.7 vs. 3.4 +/- A 0.6 U/L, respectively; p < 0.001) compared with healthy controls. On the other hand, MS patients had lower concentrations of NO (12.3 +/- A 6.9 vs. 17.4 +/- A 2.5 mu mol/g protein, respectively; p < 0.001) and TAS (0.82 +/- A 0.27 vs. 0.26 +/- A 0.15, respectively; p = 0.011) compared with healthy controls. In conclusion, these findings indicate that the oxidative stress plays an important role in the pathogenesis of MS.
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    Öğe
    Sensitivity and specificity of terminal latency index and residual latency in the diagnosis of carpal tunnel syndrome
    (Verduci Publisher, 2011) Uzar, E.; Tamam, Y.; Acar, A.; Yucel, Y.; Palanci, Y.; Cansever, S.; Cevik, M. Ugur
    Objectives: Traditionally, nerve conduction study (NCS) are used to diagnose carpal tunnel syndrome (CTS). However, no NCS has the sufficient sensitivity or specificity values to diagnose CTS by itself. Median terminal latency index (mTLI) and median residual latency (mRL) are parameters that calculated to identify abnormalities in distal segments of the median motor nerve. There are few studies on mTLI and mRL in the diagnosis of CTS. The objective of this study was to examine the sensitivity and specificity of mTLI and mRL together with NCS in the diagnosis of CTS. Patients and Methods and Results: The diagnostic sensitivity of mTLI and mRL were calculated and compared with the conventional NCS. Sensitivity values of electrophysiological findings were as follows: median distal sensory latency (mDSL) 91.5%, fourth finger median-ulnar sensory (M4-U4) latency difference 91.5%, mTLI 90.1%, median sensory nerve conduction velocity (mSNCV) 87.4%, and median motor distal latency (mMDL) 68.6%. Specificity values of electrophysiological findings in those with carpal tunnel syndrome were mSNCV 98.6%, mMNCV (median motor nerve conduction velocity) 98.6%, median motor wrist muscle action potential amplitude 98.6%, median sensory nerve action potential amplitude 97.4%, mSDL 97.3% and M4-U4 (fourtm finger median-ulnar sensory peak latency difference) latency difference 97.3%. In all CTS patients with long mMDL values, mTLI was found to be lower, however in 22 CTS patients (22.6%) with normal mMDL, mTLI was also found to be lower. Compared with mMDL, the sensitivity of mTLI in the diagnosis of CTS was found to be higher but its specificity was lower. No differences were found in the sensitivity and specificity of mRL and mMDL. The electrophysiological findings with the highest sensitivity and specificity in diagnosing CTS among conventional NCS were mSDL, M4-U4 peak latency difference and mSNCV. Conclusions: It was concluded that mTLI and mSDL can complete each other in the detection of abnormalities of sensory and motor fibres in the diagnosis of CTS.
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    Öğe
    Serum cytokine and pro-brain natriuretic peptide (BNP) levels in patients with migraine
    (Verduci Publisher, 2011) Uzar, E.; Evliyaoglu, O.; Yucel, Y.; Cevik, M. Ugur; Acar, A.; Guzel, I.; Islamoglu, Y.
    Objective: Although migraine has been related with an increased risk for ischemic stroke and cardiovascular events, there is insufficient data for role of pro-brain natriuretic peptide (pro-BNP) in migraine. In present case-control study, serum levels of pro-inflammatory (TNF-alpha, IL-1 beta and IL-6) and anti-inflammatory cytokines (IL-2, and IL-10) of migraine patients were investigated to determine the role of cytokines and pro-BNP in migraine. Patients and Methods: Sixty-four consecutive newly diagnosed migraine patients and 34 healthy controls were enrolled. Serum TNF-alpha, IL1 beta, IL-2, IL-6, IL-10 and pro-BNP levels were measured by using a chemiluminescence assay. Results: Migraine patients had significantly higher concentrations of IL-1 beta and IL-6 compared with the healthy controls (for IL-1 beta; 5.73 +/- 1.44 vs. 4.90 +/- 1.40 pg/mL, respectively, p = 0.006; for IL-6; 3.1 +/- 1.44 vs. 2.40 +/- 0.22 pg/mL, respectively, p = 0.007). The mean IL-10 levels were found to be significantly lower in migraine patients (3.38 +/- 2.93 pg/mL) than controls (6.76 +/- 1.48 pg/mL) (p = 0.007). There were no differences in TNF-alpha (27.2 +/- 48.1 vs. 15.4 +/- 0.7) and IL-2 (1017 +/- 661 vs. 1153 +/- 228) levels between patients with migraine and healthy controls. Migraine patients had higher concentrations of pro-BNP compared with healthy controls (27.0 +/- 28.0 versus 13.2 +/- 8.6, p = 0.006). Conclusions: Migraine patients have higher serum IL-1 beta and IL-6 levels, and lower IL-10 levels than healthy subjects. These findings support that cytokines may be related to neurogenic inflammation in the pathogenesis of migraine. Also, increased pro-BNP may indicate to preclinical cardiac involvement in patients with migraine.